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이영란,배승열,권대환,안인섭,김유영,Lee, Yeong-Ran,Bae, Seung-Yeol,Gwon, Dae-Hwan,An, In-Seop,Kim, Yu-Yeong 한국재료학회 2001 한국재료학회지 Vol.11 No.10
In order to improve the grindability of magnetic abrasive, Fe-WC magnetic abrasives were made by a plasma melting method after ball milling at various times. This study aims to investigate homogeneously distributed hard phases in Fe matrix and strong bonding between the Fe-matrix and the hard phase. According to XRD, SEM and OM observation, Fe-WC magnetic abrasive powders exhibit the best grindability by plasma melting for 30h ball milling. As a result of magnetic abrasive polishing, the surface roughness, R_{max}$ 5.0$\mu\textrm{m}$, before magnetic abrasive polishing, was reduced to R_{max}$ 2.4$\mu\textrm{m}$. The new magnetic abrasive polishing process is thought to be the useful methods for the automation of three dimensional surface polishing.
이영란(Lee, Yeong Ran),이명하(Lee, Myung Ha) 한국간호교육학회 2016 한국간호교육학회지 Vol.22 No.1
Purpose: The purpose of this study was to explore the levels of disaster preparedness competency in public health workers and identify influential factors on disaster preparedness competency. Methods: The data was collected through self-report questionnaires from a convenience sample of 281 public health workers in 2014 in Korea. The data was analyzed using descriptive statistics, t-test, ANOVA, and multiple regression. Results: The mean disaster preparedness competency score was 2.77 and the mean disaster educational needs score was 4.01. Disaster preparedness competency had a statistically significant difference by gender, position, experience of disaster education in workplace, and experience of BLS education. As a result of the multiple regression analysis, disaster preparedness competency accounted for 11.6% of the variance by gender, experience of disaster education in workplace, and experience of BLS education. Conclusion: The results of this study reveal that gender, strengthening education of disasters in the workplace, and education of BLS should be taken into consideration and integrated when developing an effective educational program in order to enhance disaster preparedness competency in public health workers.
이영란(Yeong-Ran Lee),박상준(Sang-June Park) 한국경영과학회 2015 經營 科學 Vol.32 No.4
Word-of-Mouth (WOM), which is the unpaid spread of a positive marketing message from person to person, has been shown to be even more effective in influencing purchase decisions than traditional advertising channels. The effects of WOM might be different by types of persuaders (purchasers vs. non-purchasers), however, the current body of research has not given attention to the differential effects of WOM. This study focuses on whether or not potential customers are influenced by the WOM from non-purchasers as well as from purchasers, and it investigates if the impacts of WOM from non-purchasers are different with those from purchasers. Based on conjoint analyses, it concludes that potential customers are affected by the communication with non-purchasers as well as with purchasers but the impacts of non-purchasers are not greater than those of purchasers.